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Sci 10 Biology
S10 Chapter 1 The Scope of Biology
21
Science
10th Grade
09/01/2009

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Term
biosphere
Definition
all the parts of the planet that are inhabited by living things; sum of all Earth's ecosystems
Term
ecosystem
Definition
community of living things in an area, plus the nonliving features of the environment that support them
Term
organism
Definition
living thing
Term
cells
Definition
Life's basic units of structure and function. All organisms are made of one or more of these
Term
deoxyribonucleic acid (DNA)
Definition
molecule cntains the instructions for a cell to make all the other molecules it needs to function
Term
genes
Definition
A segment of DNA that codes for a specific trait. units of inherited information.
Term
species
Definition
distinct form of life. two members of this are the same if they can breed and produce fertile offspring.
Term
domain
Definition
broadest category that many biologists use in classifying life forms
Term
unicellular
Definition
consisting of a single cell
Term
prokaryotic cell
Definition
"Before Nucleus" cell lacking a nucleus or membrane bound organelles
Term
eukaryotic cell
Definition
"true nucleus" cell with a nucleus (surrounded by its own membrane) and other internal organelles
Term
multicellular
Definition
organisms consisting of many cells, not just one
Term
photosynthesis
Definition
process by which plants make food
Term
producer
Definition
organisms that produce the food upon which the entire ecosystem depends
Term
consumer
Definition
organism that eat (consume) food made by producers
Term
homeostasis
Definition
"steady state"
Term
adaptation
Definition
inherited characteristic that improves an organism's ability to survive and reproduce in a particular environment
Term
population
Definition
a localized group of organisms belonging to the same species
Term
natural selection
Definition
this is the natural environment "selecting" certain inherited traits
Term
evolution
Definition
"process of change"
Term
system
Definition
this has properties that are based on the arrangement and interactions of its parts
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